Sellers:

http://www.tf2outpost.com/trade/22038457 - 8 Ref (2 in stock; tried to sell them for a key a week ago but changed)

http://www.tf2outpost.com/trade/23565661 - 8.55 Ref

Classifieds:

http://backpack.tf/classifieds/?item=Tuque%20or%20Treat&quality=6&tradable=1&craftable=1

1x 8 Ref

1x 8.55 Ref

1x 9 Ref

1x 1 Key

Conclusion:

- The dropping the range a bit, removing the high-end

- Literally, no sellers at 9 Ref on Outpost or Bazaar.tf

- This item is very limited on the market, these are the only available proof. Other sellers for ths item are at 1 key.